AttachmentPickerActions
constructor(onAttachmentItemSelected: (AttachmentPickerItemState) -> Unit, onAttachmentsSelected: (List<Attachment>) -> Unit, onCreatePollClick: () -> Unit, onCreatePoll: (CreatePollParams) -> Unit, onCreatePollDismissed: () -> Unit, onCommandSelected: (Command) -> Unit, onDismiss: () -> Unit)